किस (m) के लिए \(x^2+mx+49\) पूर्ण वर्ग त्रिपद बनेगा?

For which (m) will \(x^2+mx+49\) be a perfect square trinomial?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (14)

Step 1

Concept

\(49=7^2\), and a perfect square needs middle term \(2\cdot7x=14x\). Exam tip: take the square root of the last term.

Step 2

Why this answer is correct

The correct answer is B. (14). \(49=7^2\), and a perfect square needs middle term \(2\cdot7x=14x\). Exam tip: take the square root of the last term.

Step 3

Exam Tip

\(49=7^2\) और पूर्ण वर्ग के लिए मध्य पद \(2\cdot7x=14x\) चाहिए। परीक्षा में अंतिम पद का वर्गमूल लें।

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Mathematics Answer, Explanation and Revision Hints

किस (m) के लिए \(x^2+mx+49\) पूर्ण वर्ग त्रिपद बनेगा? / For which (m) will \(x^2+mx+49\) be a perfect square trinomial?

Correct Answer: B. (14). Explanation: \(49=7^2\) और पूर्ण वर्ग के लिए मध्य पद \(2\cdot7x=14x\) चाहिए। परीक्षा में अंतिम पद का वर्गमूल लें। / \(49=7^2\), and a perfect square needs middle term \(2\cdot7x=14x\). Exam tip: take the square root of the last term.

Which concept should I revise for this Mathematics MCQ?

\(49=7^2\), and a perfect square needs middle term \(2\cdot7x=14x\). Exam tip: take the square root of the last term.

What exam hint can help solve this Mathematics question?

\(49=7^2\) और पूर्ण वर्ग के लिए मध्य पद \(2\cdot7x=14x\) चाहिए। परीक्षा में अंतिम पद का वर्गमूल लें।